Carriage pull band for typewriting and like machines



H. E. COOK CARRIAGE PULL BAND.FOR TYPEWRITING AND LIKE MACHINES Filed Sept. 24. 1920 WITNESSES ZZJQ;

INVENTDRI HIE ATTURNEY' PatentedJuly 10,1923. I e I HAR Y n. COOK, or wnsmns'roit nrsrnroror cowmmassmnor; Tenement TYPnwRrrERcoMPANY; or Imon; NEW YoaK; n'oonronn'rxon ornnw YORK; 1

I OARRTAQE PULL BA D F011 'ryrnwnirinennn jm'xs na mms,

Application i'iledpseptemher 24,1926. serialj liTo, 412,426.

To all whomz't mag concern."

Be'it known that'I, HARRY'E. 000K, citizen ofathe United. States, fand resident of hereinafter appear, my invention consists in apull band of the character set forth. in the" the city of Washington, District of Colum .bia, have invented certain newand useful Improvements in Carriage Pull Bands for Typewriting and like Machines, of which the following is a specification.

My invention relatesto pullbandsfor typewriting and like machines.

It has been customary heretofore to -use metallic and textile pull or drawbands to connect the carriage of a typewriting or.

like machine to its spring drum or motor in order to move the carriage from the motor through said pull band. Certain disadvantages have been found in the use'of both metallic and textile pull bands formerly employed. While metallic bands possess certain advantages over the textile bands,

the former? are liable in the operation-of the machine to slip oi the drum of the motor on which they are vwound and become buckled, twisted or'damaged, The textile bands also are liable to slipoff the drum,

and the lack of stiifness in thetextile bands render them more difiiculttoconnect with the drum or-carriage than the stiffer metallic bands. This; difliculty is more pronounced and time consuming in some machines than in others, as where, for example, the band must be threadedaround or through .partsof the machine to make thewhich it is wound, and which. neverthelessis still? enough to be readily threaded through or around parts'of the machine and be connected to the motor" drum and carriage. J I

To the above and other ends which-will following description, and particularly pointed out in the appended claim.

' In the accompanyingdrawings wherein like reference characters indicate corresponding parts in the various views, 7

Figure lis an enlarged detail. face View of a textile pull band of the usualconstruc- Figure?) isan ed f Figure 2] is" a frag'ment ary' edge view of thefsa'me'j band afterhaving beentreatedf F u fet m ta y-f es t nef' the same.

The band as shown in l comprises '1 a textile body portion or strip of suitable woven fabric 1, such for exampleas is now in common use. To each end of the stripis shown attacheda'sfastening device 2 by which the band is connected atone end to, the spring drum and .at the other end to the carriage. In the present instance a free end of the strip is passed through an opening 3 in one of the devices 2* and" is bent back on'itself to form a loop arounda cross of the strip is then connected to the body portion thereof bya'sheet metal clamp or-j Y I Intreating the textile band in accordance with my invention I incorporate therein 'a' I stiffening substance which preferably is like-. I wise sufiiciently adhesive to prevent the band bar 4.- ofthe fasteningdevice. The free end fromeasily slipping oifthe spring drum on v which it is wound. Good-"results have been obtained by the use of a glutinous substance such as 'rosin. One method of treatment which has produced a band that is highly eflectivej infuse is, the following :,A textile band of ,the character described, and such I as is shown in Fig. 1, istplaced in a bath or, compound composed of three parts rosin and one part alcohol by bulk. After it has re utes the band 'is removed and held at its ends by two supports in a taut condition to vmaimed i .the compound about fifteen min 931 prevent itjfrom shrinkin Thenband-isi held'in this condition until it is air-dried sufliciently to be iin'a condition for use, i k which generally requires about twelve hours. j

The'proportions of rosin and alcohol em= ployed may be varied. A'test to determine how far these proportions may be variedis 5 band in the manner described, the outstandto press the substance between thesfingers'lff- When the substance becomes sticky it'may' i be used effectively. a ll not Itwill be understood that by treating the e in Figs. 1 and 2) sink and become more closely incorporated in thebody of the band as shown in Figs. 3 and'l The compound" also serves to connect the fibres together adhesively thus adding strength to the band without in any manner injuring the fibres but, on the other hand, adding to the durability thereof, The band after being treated and dried in the manner described will be comparatively still, though flexible, corresponding approximately to the stiffness and flexibility of a metal band, which enables it to be easily threaded into the machine and readily connected to'the spring drum and the substance used to carriage. Moreover, V stifien the band s of such a character that the band has a strong it is Wound, thus avoiding the hitherto obtendency to cling to the smooth surface of the drum on which jectionable liability of readily slipping OK the drum.

lVhat I claim as new and desire to secure by Letters Patent, is

machineand clin'gy enough to prevent slipping. Signed at trictv of i lolum oia this 20th day 03. Septemher, A. 1).1920.

4 HARRY E. COOK.

WVitnesses:

' W. J MGNALLY,

JNoII. NLEANY.

the city of Washington, Dis 

